Cameron has written a very nice post on how open science has altered his work practices for the better:
I find that as I do my experiments and record them I take more care, I describe them more clearly, and I take more care to preserve and index the data properly. More generally I feel more inclined to share my ideas and preliminary results with others. And part of this is because I am aware that double standards will be obvious to anyone who is looking. Standards and discipline in maintaining them make for better science and for better people. Anyone who is honest with themselves knows that sometimes, somewhere, there is a temptation to cut corners. We all need help in maintaining discipline and being open is a very effective way of doing it.
It would be a kinder, gentler and more productive research world if more people went down the same road.